From db3909d27d78bbe62de25fa8136428e27d4a7e4e Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Tue, 14 Mar 2017 08:50:17 +0000
Subject: [PATCH] ITS#8725 add slap_sl_mark / slap_sl_release

For fast cleanup after constructing disposable entries
---
 servers/slapd/proto-slap.h |  5 +++++
 servers/slapd/sl_malloc.c  | 18 ++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/servers/slapd/proto-slap.h b/servers/slapd/proto-slap.h
index 7478067ea4..84013edd31 100644
--- a/servers/slapd/proto-slap.h
+++ b/servers/slapd/proto-slap.h
@@ -1858,6 +1858,11 @@ LDAP_SLAPD_F (void *) slap_sl_calloc LDAP_P((
 	ber_len_t nelem, ber_len_t size, void *ctx ));
 LDAP_SLAPD_F (void) slap_sl_free LDAP_P((
 	void *, void *ctx ));
+LDAP_SLAPD_F (void) slap_sl_release LDAP_P((
+	void *, void *ctx ));
+LDAP_SLAPD_F (void *) slap_sl_mark LDAP_P((
+	void *ctx ));
+
 
 LDAP_SLAPD_V (BerMemoryFunctions) slap_sl_mfuncs;
 
diff --git a/servers/slapd/sl_malloc.c b/servers/slapd/sl_malloc.c
index ff56c4f249..32b61f40e4 100644
--- a/servers/slapd/sl_malloc.c
+++ b/servers/slapd/sl_malloc.c
@@ -137,6 +137,9 @@ slap_sl_mem_destroy(
 	struct slab_object *so;
 	int i;
 
+	if (!sh)
+		return;
+
 	if (!sh->sh_stack) {
 		for (i = 0; i <= sh->sh_maxorder - order_start; i++) {
 			so = LDAP_LIST_FIRST(&sh->sh_free[i]);
@@ -649,6 +652,21 @@ slap_sl_free(void *ptr, void *ctx)
 	}
 }
 
+void
+slap_sl_release( void *ptr, void *ctx )
+{
+	struct slab_heap *sh = ctx;
+	if ( sh && ptr >= sh->sh_base && ptr <= sh->sh_end )
+		sh->sh_last = ptr;
+}
+
+void *
+slap_sl_mark( void *ctx )
+{
+	struct slab_heap *sh = ctx;
+	return sh->sh_last;
+}
+
 /*
  * Return the memory context of the current thread if the given block of
  * memory belongs to it, otherwise return NULL.
-- 
2.39.5